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| A Perfect Little 12v MAME Amp |
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| orion:
--- Quote from: Finchbyrd on August 28, 2009, 06:25:14 am ---Noob questions coming at ya! Which of these:http://cgi.ebay.com.sg/ws/eBayISAPI.dll?ViewItem&item=260433724099, http://www.parts-express.com/pe/showdetl.cfm?Partnumber=248-462,http://www.parts-express.com/pe/showdetl.cfm?Partnumber=310-2048 will power these http://www.bestbuy.com/site/olspage.jsp?skuId=9202631&type=product&id=1218057726500 without issue? I'm very behind on stereo stuff. --- End quote --- Yes, they should work fine. Like I said I own the Pink Lepai one and it is pretty good. That one doesn't come with a power supply so, just make sure if you go that route you have a 12V 5A power supply such as this one http://cgi.ebay.com.sg/12V-DC-5Amp-12V-5A-Suppy-LCD-Monitor-Power-Adaptor_W0QQitemZ250488888311QQcmdZViewItemQQptZLH_DefaultDomain_216?hash=item3a524d1bf7&_trksid=p3286.c0.m14 Actually it can take 6v-18v and 5a-6a |
| Nacimroc:
Just to warn people, I got one of these original ones the poster stated! After 7 days he finally emailed me and said it will be 10 more days before its even posted, so in or around 1 month before (if) I get it! |
| shatteredzman:
I bought a little amp like this from ebay. These are usually called motorcycle amps but in reality they are usually just crappy amps. They often claim to be able to push several hundred watts but a good rule of thumb I use is to divide the advertised wattage by 10 or 15 to get a good estimate of the amps max power in RMS watts. I bought this amp for $10. I used some crappy walmart sony speakers I bought years ago with this amp they are 15 watts RMS. http://reviews.walmart.com/1336/4694343/reviews.htm This amp uses a barrel connector but it did not come with a cable. I was able to find one that fit fairly easily and I wired it directly to the computers power supply without a problem at all. It works great but the distortion is horrific at higher volumes or with the bass turned up. However I can turn the volume up with a decent amount of bass to the point where it is more then loud enough when standing in front of the arcade cabinet. This setup is definitely not desirable for a jukebox setting but the amp/speaker combo worked out great for my cabinet. |
| MaximRecoil:
--- Quote from: shatteredzman on August 28, 2009, 03:46:16 pm ---I bought a little amp like this from ebay. These are usually called motorcycle amps but in reality they are usually just crappy amps. They often claim to be able to push several hundred watts but a good rule of thumb I use is to divide the advertised wattage by 10 or 15 to get a good estimate of the amps max power in RMS watts. I bought this amp for $10. --- End quote --- Yeah, those ridiculously high ratings are "peak" ratings at something like 10% THD and 14.4VDC input; which is meaningless. No one wants to listen to music at 10% THD. Anything above 1% THD is noticeable to the human ear. Many manufacturers use RMS ratings at .1% THD and 13.8VDC input; and amplifiers rated in such a manner are generally considered to be "underrated", because (assuming an unregulated amplifier, which is the most typical) if you give them closer to 14.4VDC (the maximum voltage of a car electrical system before the battery boils over) and drive them to 1% THD, the amp will be putting out way more power than it is rated for. An easy way to determine the actual maximum power of an amp is to look at its fuse size (or its recommended fuse size if it doesn't have a built-in fuse). Watts = volts * amps. So if you have a 5 amp fuse, then the amp can not put out more than about 60 watts total before blowing the fuse (5 * 12). |
| mlalena:
Another thing to watch for is ILS (If Lightening Strikes) amplifiers. Basically, it will push that many watts when it is hit by lightning. I've actually seen car stereo amps with ILS logs on them. http://www.caraudiobook.com/car_audio_amplifiers/car_audio_amplifiers.htm |
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